Hauyne型構造をとる1群の新化合物の合成と結晶構造

概要

論文の詳細を見る
A group of new compounds belonging to hauyne type structure could be synthesized by means of substitution of the components of hauyne, Ca2Na6Al6Si6O24(SO4)2, i.e. all of Ca and Na by Ca, Sr or Cd, Al by Be, and all of Al and Si by Al, moreover SO4 by CrO4, MoO4 or WO4.As the representatives of these compounds, Ca8Al12O24(SO4)2, Ca8Al12O24(WO4)2, Sr8Al12O24(SO4)2 and Sr8Al12O24(WO4)2 were chosen and the crystal structure was examined in comparison with hauyne, in which the space group was selected as I 23.The values of reliability R=∑||F0|-|Fc||/∑|F0| for each compound were all obtained as below as 0.20, if a set of suitable parameteres was given for the atoms in each compound.It was confirmed that these compounds crystallized as hauyne type structure, therefore AlO4 tetrahedra linked each other, irrespective of the absence of SiO4, to form 3-dimensional framework. The strain of each tetrahedron of SiO4 or AlO4 in hauyne and calcium containing compounds was found as that the 2 edges were longer than 4 edges, contrary to the result obtained by Machatschki on hauyne. In the case of strontium containing compounds, however, the 2 edges were shorter than the 4 edges.In relation to the fact that these aluminate double salts possessed hydraulic property, the existence of 4-fold coordinated Al, asymmetrically coordinated cation such as Ca, and isolated complex anion such as SO4 in the structure was characteristic.
社団法人日本セラミックス協会の論文
1965-01-01

著者

近藤連一
東京工業大学

Hauyne型構造をとる1群の新化合物の合成と結晶構造

スポンサーリンク

概要

著者

関連論文

スポンサーリンク